Hyundai:: Elantra:: Check of the unilateral vacuum valve

15.3. Check of the unilateral vacuum valve

When checking the unilateral valve, the valve has to be in a vacuum hose.

PERFORMANCE ORDER

The unilateral valve is pressed in a vacuum hose in a certain situation.

Connection of the vacuum pump	Criteria
From the vacuum amplifier of brakes	Vacuum is created and keeps
From an inlet collector (In)	Vacuum is not created

If the unilateral valve is faulty, replace it together with a vacuum hose.